Android 4.1.2 Jelly Bean firmware OS are now available for Sony Xperia T LT30p smartphone. For all the users who couldn’t update their Sony Xperia T LT30p device by OTA, we present to them a step-by-step tutorial explaining How to manually update the Xperia T with official Android 4.1.2 Jelly Bean firmware.
This guide can be applied, by those owners also who have a rooted device and can’t upgrade their device by OTA with the official updates. Also, if, you have a custom ROM installed on your Xperia T smartphone, with this method, you can apply this official firmware on your smartphone.
For all Sony Xperia T devices that are rooted, or running a custom ROM, or is unlocked, this method is extremely beneficial. You can update your smartphone with official firmware. You have nothing to worry about this and if you follow all the steps and the correct order at the end of this tutorial, you’ll be able to install this firmware in your device.
Pre-requisites and Guidelines:
This Android 4.1.2 Jelly Bean firmware can be applied only for Sony Xperia T model number LT30p devices. So don’t try to apply the same for any other device, this may damage your device.
This update will come with significant changes for your device, new features applications and capabilit. So it is required to read some information about this latest update to know how to use it, this firmware is dubbed as 9.1.A.0.489 Android Jelly Bean firmware.
The warranty of your Sony Xperia T device will not be voided if you apply this update. For the rooted devices or for devices that is running a custom ROM, by performing this update, you can restore the warranty.
If you have a rooted device, or run the Custom ROM, after this update, the rooted rights will be revoked, and you’ll be able to update the device by OTA for the future updates available.
You can obtain again the root rights if you follow a proper tutorial which explains proper methods to root it. Also, you can use our generic root tutorial from here.
During the updating process, a windows computer is required; also you need a Sony Xperia T device and its USB cord.
Disable or uninstall the security programs that are running in your devices, PC and smartphone. The Antivirus and Firewall for example can interfere with the updating process and can interrupt or modify the correct transfer of data.
Enable the USB debugging option on your Sony Xperia T device. To do this go and enable it from the following path: “Settings -> Applications -> Development -> USB debugging”.
Your device’ battery must be charged more than 65% to complete this operation otherwise low battery may force your device to shut down in middle of the flashing process.
Back-up all your critical information stored in your device’ internal memory, save your SMS, contacts, market applications, internet connection, call logs, or any other data that you consider are essential for you. Don’t perform the back-up using the ROM manager or the PC Companion applications.
Download and install the proper drivers for your Sony Xperia T device, for that follow the link from here.
How to Update Sony Xperia T LT30p to Official Android 4.1.2 Jelly Bean firmware:
- Download the Android Jelly Bean 4.1.2 update file from here.
- Download the Flash tool from here
- Install the Flash tool, after that open it and follow all the on-screen prompts lines.
- Create a new folder in your desktop PC and place the downloaded .ftf file there.
- Now, navigate on the path where you have installed the Flash tool. This path will be for example like this C:\Flashtool
- Open the Flash tool app.
- Now from the Flash tool interface that has been opened, click on the “thunder” symbol.
- Now, select the “flashmode” option and confirm with OK
- From the firmware selection window, click on the “…” button.
- Select the downloaded .ftf file and pick the file.
- Verify and make sure that the “wipe cache” and “wipe data” option are being checked.
- Now, connect your Sony Xperia T smartphone to your PC while pressing on the Volume UP button to enter into the Flash Mode.
- The update process will begin automatically.
- All you need to do now is to wait until the update will be applied.
- At the end, when the flashing process is done, disconnect your device from the PC
- Reboot your Sony Xperia T device.
Note: If your device gets a boot loop, reboot the device into the Recovery Mode menu. From this menu, wipe the data again. To do that select the “wipe data factory reset” and “wipe cache partition” option and confirm your action.
Check that the Jelly Bean 4.1.2 9.1.A.0.489 firmware is on the following path “Settings -> About Phone -> Build Number”.
That’s all! These are all the steps that you need to follow in order to know how to manually update your Sony Xperia T model no LT30p to the Official Android 4.1.2 Jelly Bean firmware.
After you test this new update, please let us know in our comment sections about your impressions of our tutorial.
Congratulations! Now you are capable of rooting your precious device. Enjoy more features. All the best!
